Apparatus for signaling.



F. GARDNER.

APPARATUS FOR SIGNALING.

APPLICATION FILED JUNE 22.1917.

Patented Oct. 8, 1918.

FULTON GA RDNER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF T E.GARDNER, OF PITTSBURGH, PENNSYLVANIA, AND ONE-FOURTH TO SEYMOUR STEDMAN,or CHICAGO, ILLINoIs.

APPARATUS Fen SIGNALING.

To all whom it may concern:

Be it known that I, FULTON GARDNER, a citizen of the United States,residing in Chicage, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Apparatus for Signaling, of

which thefollowing is a specification.

My invention relates to apparatus for operating'all kinds ofelectromagnetic signaling systems requiring any measure of electriccurrent, said apparatus being ,.-responsive to'the impact of soundwaves;

To this end my invention consistsin the novel devices and novelcombination of parts or devices. herein shown and described and moreparticularly pointed out inthe claims.

In the accompanying drawings, which form a part of this specificationFigure 1 is a vertical section of a device embodying my invention.

Fig. 2 is a plansection on line 2', of Fig. 1. The diagramshowninconnection with Fig. 1, is one formof elec tromagnetic signal systemoperative with mylinvention.

ike numerals in both figures refer to identical parts.

3, in Flg. 1 and Fig; 2 the porcelain base and insulating part of anordinary standard receptacle, such as used in electric lightinstallations.- 4, in the same figure is the screw threaded metal partof the receptacle; 20 and 21, in both figures, are metal electricconductor parts with wire terminal screws insertedl 5, is a screwthreaded metal part adapted to screwinto thepart 4. 7

part 5; 9,, is the wire spool'of an, electro-' wit 6, 1s a metal capdirectly connected to' part 5, and supporting binding posts 13; 7, in-Figs. 1 and 2, is a porcelain part with an interior chamber and threadedupon its exterior adapted to screw into the metal et,and 10, is the coreof the magnet the lower endextending through'an opening in the porcelaincup part 7 and it is shown in contact with the central electrode part2lof the receptacle. .11, is the upper end of the core 10', bored outthrough which to thread the lead wires from the magnet 9,- to thebinding posts 13; 12, is a tube of insulating material surroundin thecore part 11. 8, is a circular metal p ate in contact with part 5, andforming a cover for the cup 7. 8 ,'is a diaphragm andfifi are metalSpecification of Letters Patent.

Patented Oct. s, 1918.

Application filed June 22, 1917. Serial No. 176,623.

points attached to the diaphragm 8. 14,15 finely divided. metal, suchasiron filings Within a recess, formed by the magnet core and the upperpart of the electrode 20, thus completing the circuit through the parts4, 5, 8, 8, l4, l0 and 21.

25, is a condenser bridged across the independent signal circuit, thepurpose of which is obvious to persons skilled in the art.

In appearance,'the part of myinvention,

described in detail, is that of an ordinary lamp socket or standardreceptacle, with a fuse plug, screwed thereinzuponwhich is a mounted twobinding posts.

i The magnet 9, coherer'14, and diaphragm 8, withinthe chamber of theinsulating part 7 are-movable. The plug part 6, 1 when screwed into thereceptacle 4, the core 10,

will be in" contact with the electrode part 21; The proper ad ustment ofthe coherer granules 14, the diaphragm 8 and magnet 9, is obtained bregulating the compression by the screw 'tireaded plug into the correr fspondingly'threaded receptacle. 7

In operation my invention, assuming itis V properly installed, [at ornear. a bank vault or safe, which it is intended to protect,the

sound caused by the blo of a hammer, other instruments, or explosion,would -vi-. ,brate the diaphragm of the microphone, the impulseofincreased current would beam-. plified by the induction coil, thesecondary; 1

winding of which is directly-connectedto the magnet. This in turn willenergize the magn duction, causing the divided metal to cohere,

' thereby practically closing-the independentl 105'.

signal circuit and-causin the signal devices j to respond simultaneous ywith the impact of the sound waves upon the diaphragm of the microphone.1

et and-the metal filings in contact with the magnet will becomemagnetized by in-' i The diaphragm part 8 mounted above the magnet willact. as an armature of the magnet, the points 8 carried by this arma:ture extend down into the cohering metal.

When the electromagnet is demagnetize d, the diaphragm-armature willreturn to Its.

normal position, and the metal points carried by the armature willlikewise react and disturb. the metal particles causing decoherence, andthereby open the independent signal circuit. It is a ell known fact thatmetal finelydivided is an electric conductor of-enormous resistance, butwhen caused to cohere b electromagnetic induction the retively lowpotential. The. function ofthe coherer as used in my invention issimilar to that of a switch to make and break a relayed independentcircuit and energize and actuate signaling devices, such as electriclamps, bells, gongs, spark coils, telegraph Sounders, etc. marinesignaling.

It should be understood that the struc ture described by thisspecification is illustrative only and for the purpose of makingmyinvent1on more clear, and that Ido not regard the invention as limitedto any of the particularities of construction chosen for purposes ofillustration, except in .so far 'as I-have included such limitationswithin the. terms of the following claims.

What I claim is: 1. relay of the class described ce' sistance 1s greatlydecreased, and will admit the passage of electric current Of compara- Itis also my purpose to use it in sub-.

ing a receptacle and a plug in electric contact-one with the other amagnet within said plug, the winding of .said magnet in circuit with amicrophone and a source of potential, means within said plug operablependent electric current for the purpose specified and substantially asdescribed.

I 2. In a relay of the class described a screw threaded plug adapted tofit a screw threaded socket, an insulating cup within the'screw :40 bysaid magnet to relay and control an indethreaded part of said plug anelectromagnet within s aid c'up and an elongated core oftending'th'rough an opening in the bottom of said cup, and means toadjust said magnet in relation to its armature;- said armature formin acover of said cup, and in contact with t e threaded part-of said plug,for the purpose intended and substantially as described. 3. A relaycomprising a screw threaded insulating part and a screw threaded.metallic part by which said insulating part :and said metallic part areheld together and acap piece covering both of said parts with bindingposts mounted thereon through which electric current is transmitted tothe winding of the relay magnet within said insulating part, and meansto conduct a relayed electriccurrent through the core of said magnet.-

. FULTON GARDNER. Witnesses: MARGARET S. MACCARTHI,

EDYTHE PRUNK.

said magnet comprising an electrode ex-

